Floating dispensers

ABSTRACT

A floating dispenser for floatingly delivering a dispersant or dispersants to a body of water with the floating dispenser floating in an upright condition when a dispersant is present in a dispenser cartridge of the floating dispenser with the dispenser self inverting 180 degrees in response to consumption of the dispersant in the dispenser cartridge to thereby provide a visual alert that one should replace the dispenser cartridge in the dispenser with a fresh dispenser cartridge.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of application Ser. No. 14/544,609 filed on Jan. 27, 2015 titled Floating Dispensers (pending), which is a divisional application of application Ser. No. 13/507,114 filed on Jun. 5, 2012 titled Floating Dispensers (now U.S. Pat. No. 8,999,259) and claims priority from provisional application Ser. 61/627,528 filed Oct. 13, 2011 land Ser. No. 61/627,526 filed Oct. 13, 2011; and Ser. 61/687,001 filed Apr. 16, 2012.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

None

REFERENCE TO A MICROFICHE APPENDIX

None

BACKGROUND OF THE INVENTION

The concept of floating dispenser for delivering a dispersant to a body of water are known in the art. In one type of floating dispensers the dispensers contain a halogen and float upright in a body of water until the halogen is consumed whereupon the dispenser flops on its side. In another type of dispenser the dispenser sinks to the bottom of the pool and remains there until the dispersant has been consumed at which time the dispenser floats to the top of the pool to alert the operator to replace the dispenser. In another type of a floating dispenser a nondissolvable weight, such as a marble, is included in the dispenser with the dispenser floating on its side when the dispersant is consumed. As the dispenser floats on its side the marble rolls along the interior of the dispenser and transfers the weigh to the end of the dispenser causing to dispenser to invert after the dispersant is consumed.

SUMMARY OF THE INVENTION

A floating dispenser having a cartridge for floatingly delivering a dispersant or dispersants to a body of water with the floating dispenser floating in an upright condition when a dispersant is present in the cartridge and self inverting 180 degrees in response to consumption of the dispersant in the cartridge to provide a visual alert to replace the spent cartridge with a fresh cartridge by removing the spent cartridge from the dispenser and attaching the fresh cartridge to the floating dispenser.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front elevation view of a floating dispenser;

FIG. 2 is a side view of the floating dispenser of FIG. 1;

FIG. 3 is a back view of the floating dispenser of FIG. 1;

FIG. 4 is a bottom view of the floating dispenser of FIG. 1;

FIG. 5 is a top view of the floating dispenser of FIG. 1;

FIG. 6 is a side view of the floating dispenser in a body of water;

FIG. 6A is a side view of the floating dispenser of FIG. 6 as the dispersant in the floating dispenser is partly consumed;

FIG. 6B is a side view of the floating dispenser of FIG. 6 as more of the dispersant in the floating dispenser has been consumed;

FIG. 6C is a side view of the floating dispenser of FIG. 6 as the dispersant in the floating dispenser is consumed or substantially consumed;

FIG. 7 is a top perspective view of the base of a first dispensing cartridge;

FIG. 7A is a perspective of a support grid of a second dispensing cartridge, which is rotationally secured to the base of the dispenser cartridge of FIG. 7;

FIG. 7B is a top view of the base of the second dispensing cartridge;

FIG. 8 is perspective sectional view of the halogen support grid of FIG. 7A showing the location of dispersant pucks and a float with respect to the support grid;

FIG. 9 is a partial sectional elevation view of the second dispensing cartridge showing the position of the solid dispersant and the float therein;

FIG. 10 shows a user rotating the two dispenser cartridges with respect to each other in order to select a halogen dispersant rate;

FIG. 11 shows each of the dispensing cartridges having a different color;

FIG. 12 is an elevation view of the second dispensing cartridges with a portion of hemispherical cap cut away;

FIG. 12A is a partial sectional view of a shell with a concealed latch attached thereto; and

FIG. 13 is a top view of the first dispensing cartridge without the outer hemispherical shell.

DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 is a front view of a floating dispenser 10 for use in pools, spas or other bodies of water that require a continuous delivery of a dispersant in order to control a feature or characteristic of the water. A typical example of pools suitable for use of the invention are backyard pop up pools, which hold less than 10,000 gallons of water, although the invention is equally well suited for use in other types of pools or spas.

Dispenser 10, as shown in FIG. 1-5, comprises two separable dispensing cartridges, a first upper dispensing cartridge 11 having a general hemispherical shape with an outer cap or shell 11 s (FIG. 12) with a set of protrusions 12 and 13 creating the appearance a frog head and a second lower dispensing cartridge 16 also having a general hemispherical shape with an outer cap or shell 16 s (FIG. 9). The shells of dispenser 11 and 16 are typically made from lightweight polymer plastics such as polypropylene or ABS although other materials may be used without departing from the spirit and scope of the invention. The two dispensing cartridges are assembled into a single dispenser 10 having a general spherical shape.

The dispensing cartridge 11 and dispensing cartridge are 16 rotationally secured to each other to permit rotation of dispensing cartridge 16 with respect to dispensing cartridge 11 to permit one to select an appropriate dispensing rate. In the example shown the lower dispensing cartridge 16 comprises a generally hemispherical shaped cap or shell having a stand 18 comprising a flat pole region, which can be used to support the dispenser 10 in a stable upright condition when the dispenser 10 is not in use. Features comprising elongated finger dimples 17 extend midway around the circumference of dispenser cartridge 16 to permit a person to facilitate grasping and holding the dispenser cartridge 16 with one hand while the other hand grasps and rotates dispensing cartridge 11 with respect to cartridge 16 by engaging features such as protrusions 12 and 13. A reference to FIG. 10 illustrates a user generating a positive rotational grip on the dispenser 10 by placing the fingers of one hand L in the elongated finger dimples 17 of lower dispensing cartridge 16 and the fingers of the other hand R on the features forming the protrusions 12 and 13 to rotate the upper dispenser cartridge 11 with respect to lower dispenser cartridge 16. The rotation of dispensing cartridge 11 with respect to dispensing cartridge 16 controls the dispersant rate from the dispenser 10 through alignment of ports between a grid 15 (FIG. 7) of the upper dispensing cartridge 11 and a grid 30 (FIG. 7B) of the lower dispensing cartridge 16. Thus, the base 15 and the base 16 e include fluid alignable ports 29 and 34-40 to permit ingress and egress of water between the first cap 11 s and the cap 16 s.

As shown in FIG. 1 the first dispensing cartridge 11 has a general hemispherical shape with an upper protrusion 12 containing an impression 12 c to provide the appearance of a frog eye. Similarly, a second similar protrusion 13 contains a similar identical impression to provide the appearance of a second frog eye. A wavy relief 14 extends across the front of the dispensing cartridge 10 providing a smile to the frog face. In the example shown the dispenser 10 has the appearance of a frog head, however, no limitation thereto is intended as other shapes may be used without departing from the spirit and scope of the invention described herein.

FIG. 2 is a side view of the dispenser 10 and FIG. 3 is a rear view of the dispenser revealing a set of elongated ports 21 for flow of water into and out of dispersant compartments, which are located within dispensing cartridge 11 and dispensing cartridge 16. In the example shown the elongated ports 21 extend upward from flange 15 g and terminate at a level h, which is normally below the water line when dispenser 10 floats in a body of water, so that a dispersant from ports 21 goes directly into the water. In this example the elongated ports 21 are fixed openings however, if desired the elongated ports may also be provided with variable area openings without departing from the spirit and scope of the invention. A below the water line port is beneficial to water treatment since the dispersant released from the dispenser cartridge 16 goes directly into the body of water.

FIG. 4 shows a bottom view of dispenser 10 with dispensing cartridge 16 having a set of elongated finger dimples 17 extending circumferentially around the dispensing cartridge 16 to permit a user to grasp and support the dispensing cartridge 16 in a users hand. Flange 15 g includes a rectangular shaped opening 15 s, which if desired, can be used to secure a lanyard thereto to enable a user to tether the floating dispenser 10 to a structure and thus maintain the floating dispenser in a fixed location within a body of water.

FIG. 4 reveals the presence of a set of dispensing numbers or dispenser settings 0-8 spaced around the peripheral flange 15 g of dispenser cartridge 11. Dispenser cartridge 16, which is rotationally secured to dispenser cartridge 11 includes a U shaped relief 16 b that highlights an arrow 16 a that is shown in alignment with an arrow 15 a, which is located on flange 15 g which is part of dispenser cartridge 11. The alignment of the two arrows indicates the position where the upper dispensing cartridge 11 may be separated from the lower dispensing cartridge 16 by pulling the dispensing cartridge 11 and dispensing cartridge in opposite directions along a central axis of the dispenser 10. The separation of the lower dispensing cartridge 16 from the upper dispensing cartridge 11 permits one to replace a spent dispensing cartridges with a fresh cartridge. For example, if the top dispensing cartridge 11 contains minerals, which have a pool life of 6 months, and the lower dispensing cartridge 16 contains a halogen, which is consumed in 3 weeks, after 3 weeks one can separate the spent lower dispensing cartridge 16 from the upper dispensing cartridge 11 and replace the lower spent dispensing cartridge 16 with a fresh dispensing cartridge.

As dispenser 10 floats in a body of water lower dispensing cartridge 16 delivers a dispersant in to a body of water through the set of elongated ports 21 in dispensing cartridge 11. Control of the alignment of a set of internal ports in a grid of each of the dispensing cartridges 11 and 16 allows one to control the rate of dispersant from dispensing cartridge 16. For example, by rotating dispensing cartridge 11 with respect to dispensing cartridge 16 in a first direction increases the alignment of internal grid ports and consequently the flow area therebetween which increase the dispersant rate from dispensing cartridge 16. Similarly, rotating dispensing cartridge with respect to dispensing cartridge 16 in an opposite direction decreases the dispersant rate from cartridge 16.

Dispenser cartridge 11 and dispenser cartridge 16, while separable from each other, are also rotationally secured to each other to permit one to rotate dispenser cartridge 16 with respect to dispenser cartridge 11 thereby increasing or decreasing the flow area through alignment of internal ports in a grid in the dispenser cartridge 11 and a grid in the dispenser cartridge 16 without separating the two dispensing cartridges since there is only one position where the dispensing cartridges can be separated from each other. For example, if a halogen such as chorine is located in dispensing cartridge 16 the rotation of cartridge 16 with respect to cartridge 11 in one direction increases the alignment of grid ports 35-40 (FIG. 7B) with port 29 (FIG. 7) while an opposite rotation of cartridge 16 with respect to cartridge 11 decreases the alignment of the grid ports 35-40 with port 29. In either case one alters the volume of water that comes into contact with the chlorine located in dispersing cartridge 16. In this example, the area of the alignment of flow openings between dispersant compartment in cartridge 16 and cartridge 11 increase as the arrow 16 a is rotated into a position proximate a higher number on the flange 15 g and decreases when rotated in the opposite direction. The increase in the alignment of grid ports allows for a greater dispersant rate of chlorine into the body of water since there are more paths and a greater area for the chlorine to flow from the dispensing cartridge 16 to the body of water.

FIG. 4 shows that dispensing cartridge 16 includes a vent or hole 19, which is located on the bottom or pole region of dispensing cartridge 16, and FIG. 5 similarly shows that dispensing cartridge 11 also includes a set of vents or holes 12 a, and 13 a, which are located on the top or pole region of dispensing cartridge 16 and vent holes 12 b and 13 b, which are located on the top protrusions 12 and 13 of dispensing cartridge 16. The vents permit ingress and egress of air or water to each of the dispenser cartridges depending on the orientation of the dispenser 10 in a body of water. In each case the vents are located at or near the pole regions of dispensing cartridge 11 and dispenser cartridge 16. During a portion of an operational cycle of the dispenser 10 the vents enable air to escape the dispensing chambers within the dispensing cartridge 11 and 16 and during another portion the vents enable water to enter the dispensing chamber in the dispenser cartridges 11 and 16. For example, when the floating dispenser 10 is initially placed in a body of water air, which is present in the interior of the floating dispenser, is forced out the top of dispensing cartridge 11 through vents 12 a, 12 b, 13 a and 13 b as water enters the lower vent 19 in dispensing cartridge 16. This process, which may take a few minutes, allows air to escape from the interior of the dispensing cartridges 11 and 16 as water enters the bottom of dispensing cartridge through vent 19. Once the dispenser 10 is vented the buoyancy forces of dispenser 10 bring the dispenser to a floating condition as shown in FIG. 6.

FIG. 6 to FIG. 6C illustrate a feature of the dispenser that alerts a person to a condition that the dispersant located in the lower dispensing cartridge 16 has been consumed through an 180 degree inversion of the floating dispenser 10. The first spherical cap 11 contains a flotation chamber and the second spherical cap 16 may also contain a flotation chamber with a center of buoyancy of the first flotation chamber and the second flotation chamber located along a geometric axis 9 of the dispenser wherein the geometric axis coincides with a vertical flotation axis when the dispersant therein are in an unconsumed state as illustrated by FIG. 6. In the example illustrated in FIG. 6-FIG. 6C the floating dispenser 10 contains a fixed volume float 29 f (FIG. 12) with the floating dispenser 10 having a bottom heavy state (FIG. 6) when a consumable dispersant 21 is located therein and a top heavy state (FIG. 6C) when the consumable dispersant has been consumed to thereby invert the floating dispenser in an end-to-end condition. A feature of the invention is that the end-to-end inversion may be obtained solely through a weight shift within the dispenser which is due to consumption of the consumable dispersant therein. In this example the fixed volume float 29 comprises a solid float having a specific gravity less than 1 although other types of floats may be used without departing from the spirit and scope of the invention.

In a typical example a first dispersant comprising a batch of minerals, which are located in a dispersant chamber in the top dispenser cartridge 11, release metal ions into the body of water. The second dispersant, which is located in the lower dispensing cartridge 16, releases a halogen such as chlorine into the body of water. The dispenser 10 includes sufficient flotation to maintain the dispenser 10 in a floating condition even though the dispersants located in dispensing cartridge 11 and dispensing cartridge 16 have a specific gravity greater than 1. The dispenser 10 is initially configured so that the weight of the dispersant in the top dispensing cartridge 11 and the top dispensing cartridge is less than the weigh of the dispersant material in the bottom dispensing cartridge 16 and the bottom dispensing cartridge which caused the center of gravity of dispenser 10 to be located below a geometric center of dispenser 10. In this condition the dispenser 10 floats in an upright condition as illustrated in FIG. 6 with a substantial portion of the dispenser 10 located below the water line 50. FIG. 6 also shows the vertical flotation axis 9 in alignment with a geometric axis of the dispenser 10 with respect to a water line 50.

As the dispersant in the bottom dispenser cartridge 16 is gradually consumed, i.e. dissipated into the body of water, the weigh of the dispersant in a dispensing chamber in dispenser cartridge 16 decreases which causes the geometric axis 19 of dispenser 10 to form a slight angle to the vertical as shown in FIG. 6A. In this condition the water line 50 is still above the elongated ports 11 so that any dispersant released therefrom goes directly into the water. On the other hand the release of metal ions from the top cartridge 11 has relatively little effect on the weight of material in the top dispensing cartridge and hence the floating orientation of the dispenser. Consequently, the shifting of weight balance between the top dispensing cartridge 11 and the lower dispensing cartridge 16 generates a torque causing the lower dispensing cartridge 16 to move to the condition shown in FIG. 6B where the weight of the top dispensing cartridge 11 and the lower dispensing cartridge 16 are in substantial equilibrium with the geometric axis 9 located substantially parallel to the water line 50.

As the dispensing material in dispensing cartridge becomes further consumed the weight of the lower dispensing cartridge 16 becomes less than the weight of the upper dispensing cartridge 11 causing the dispenser 16 to invert to the condition shown in FIG. 6C. In the inverted condition the protrusions 12 and 13 in the dispenser 10 are located below the water line 50 as the upper dispensing cartridge 11 is located below the water line 50.

Since a portion of the weight of the dispenser 10 has been consumed the dispenser 10 also floats higher in the water as indicated by the waterline 50. In the inverted condition the bottom of dispensing cartridge 16 is visible above the water line 50 to form a visual indication that the dispensing cartridge 16 needs to be replaced.

In the example shown the use of vent hole 19 and vent holes 12 a, 12 b, 13 a and 13 b (FIG. 4 and FIG. 5) allow air or water trapped inside the dispenser 10 to come into equilibrium state as the dispenser 10 rotates from a full condition (FIG. 6) to the empty condition or the inverted condition (FIG. 6C).

While the reversal of the orientation of the dispensing cartridges 11 and 16 in floating dispenser 10 may be used to indicated the dispersant in the lower dispensing cartridge is spent one may also enhance the recognition of the lack of dispersant through use of a different color for each of the dispenser cartridges. FIG. 11 illustrates this feature with the lower dispensing cartridge 16 having a blue color and the top dispensing cartridge 11 having a green color. Thus, the portion of the dispenser above the water line changes from green to blue providing a visual alert to the operator that the dispensing cartridge has been consumed and needs to be replaced. In addition, the position of a hemispherical shell without protrusions located above the water line forms another visual indicator that the dispersant in dispensing cartridge 16 has been spent. While blue and green have been selected other contrasting colors may be used without departing from the spirit and scope of the invention.

FIG. 7 shows a perspective view of dispensing cartridge 11 revealing a flat grid or base 15 having a flange 15 g, which extends from side to side of the dispensing cartridge 11 to form an equatorial closure for the open end of the hemispherical shaped dispenser 11. Base 15 extends slightly beyond the hemispherical shell 11 s to form a flange 15 g for holding reference information to enable an operator to select the proper dispensing rates.

Grid 15 includes a set of three peg like protrusions 15 d that extend outward from the face of grid 15 to engage edges of circumferential recesses 41 a, 41 (FIG. 7B) located in the face of grid 30 on the dispensing cartridge 11. When the protrusions 15 d are in engagement with the edge of the recesses 41 a, 41 located in the face of grid on dispensing cartridge 16 it becomes difficult to rotate dispensing cartridge 11 with respect to dispensing cartridge 16. However, since the lateral extensions 20 b and 20 c, which hold grids on dispensing cartridge 15 and dispensing cartridge 16 in proximity to each other can flex slightly one can overcome the resistance through application of hand torque to dispensing cartridge 11 with respect to dispensing cartridge 16. The torsional resistance to rotation of dispensing cartridge 16 with respect to dispensing cartridge 11 provided by protusions 15 d hinders the accidental rotation of the cartridges with respect to one another but ensures that once a dispensing setting has been selected the dispensing setting remains until a person deliberately changes the setting by again rotating the dispensing cartridge 11 with respect to dispensing cartridge 16 through as illustrated in FIG. 10.

FIG. 7 shows that grid 15 includes a triangular shaped port 15 a that can be rotationally aligned with each of the set of ports 35-40 in a base 16 e in dispensing cartridge 16. In this example, the fluid ports 21 in the top dispensing cartridge 11 are visible as well as a solid float 29 having a specific gravity less than one, which provides buoyancy to dispensing cartridge 11. Although a solid float is shown other types of floats may be used including closed air compartments. Extending upward from the center of base 15 is a connector 20 having a fixed central cylindrical post 20 a that permits rotation of dispensing cartridge 11 with respect to dispensing cartridge 16 by serving as a pivot pin. Extending outward in one direction from post 20 a as well as spaced form the surface of grid 15 is a first lateral extension 20 b. Similarly, extending outward in the opposite direction from post 20 a as well as spaced form the surface of grid 15 is a second lateral extension 20 c which has a different shape from the first lateral extension so that there is only one position where the dispensing cartridges 11 and 16 can be joined in face to face contact. The lateral extensions 20 c and 20 b maintain the grid or base 15 of dispensing cartridge 11 and the grid 30 of dispensing cartridge 16 in face to face contact with each other as illustrated in FIG. 7A, which shows an isolated view of the grid 30 of dispensing cartridge 16. Grid 30 includes a set of radial ribs 30R and a set of circumferential ribs 30C that provide rigidity to grid 15 to maintain the grid 30 in face to face contact with grid or base 15 while also forming a portion of a halogen compartment. Visible within the radial and circumferential rings are a set of fluid ports 40,39,38,37,36 and 35. A reference to FIG. 7B shows the opposite face of grid 30 revealing the set of fluid ports 35,36,37, 38,39 and 40 that are located around the opening 34. Opening 34 has the shape of post 20 and lateral extensions 20 a and 20 c to permit the placement of grid 30 in face to face contact with grid 15 as the post 20 and lateral extensions 20 b and 20 c are inserted through the opening 34 to engage the opposite face of grid 30. Once in position a slight rotation of grid 15 with respect to grid 30 causes the lateral extension 20 b and 20 c to hold the grids in face to face contact as illustrated in FIG. 7A. Since the lateral extensions 20 b and 20 c are of different shape there is only one orientation of dispensing cartridge 11 with respect to dispensing cartridge 16 where the dispensing cartridge 11 and dispensing cartridge 16 can be attached or separated from each other.

Extending upward from grid 30 are a set of four resilient extensions or tabs 30 a, which have an opening therein for engaging a latch. FIG. 12A shows a concealed latch 30 d having the shape of a hook, which is located on the inside of the hemispherical shell 11 s of dispensing cartridge 11, that can be brought into engagement with a concealed tab 30 a to hold the shell 11 s and base 30 in an assembled condition. That is, by forcing the dispensing cartridge 11 onto the grid or base 30 the latch 30 d (FIG. 12A) in the shape of a hook extends into the opening in extension 30 a to hold the shell 11 s and the grid 30 proximate each other. In the example shown a set of four latches are used however, more or less latches could be used. Since the latches and the extensions are located internal to dispensing cartridge 11 and thus hidden from view it inhibits persons such as children from accidentally opening the dispensing cartridge 11 and coming into direct contact with the dispersants therein. A similar or identical set of latches and extension can be found in dispenser shell 16 and base 15 to prevent consumers coming into accidental contact with the contents therein.

FIG. 7B shows that grid 15 includes a set of arc like openings 41 and 41 a for receiving the extensions 15 d shown in FIG. 7. Since the grid 30 must be displaced in an axial direction to disengage the extension 15 d with the sides of the openings 41 and 41 a the coaction of the extensions and the openings 41 and 41 a hinder the ability of dispensing cartridge 11 to rotate with respect to dispensing cartridge 16 unless the user can overcome the rotational resistance through flexing of the grids 30 and 15. As the shells and grids are typically made from a polymer plastic which permits a small amount of flexing one can overpower the force of engagement between face 15 and face 30 through hand torque as illustrated in FIG. 10.

Grid 15 as shown in FIG. 7B includes an annular groove 31 with a set of openings 32 that provide fluid communication between openings 15 e (FIG. 7) in grid 15 to allow air to escape the dispersant chamber in dispensing cartridge 16. Typically, as the dispersant in the dispensing cartridge 16 dissipates water enters the dispensing cartridge 16. When the dispensing materiel reaches a consumed state the lower dispensing cartridge 16 becomes more buoyant than the top dispensing cartridge 11 and the geometric axis 9 begins to wander from vertical. As the process of reversing of dispensing cartridges 11 and 16 begins the openings 15 e which are alignment with the channel 31 and the ports 32 together with the vents 19, 13 a, 13 b, 12 a and 12 b allow air to escape dispenser 10 as the dispenser 10 goes through the inversion phase illustrated in FIG. 6 to FIG. 6C.

FIG. 4 show dispensing cartridge 16 having a vent 19 and FIG. 7B shows a connector 34 for attachment to a flotation member 11 for supporting the dispensing cartridge 16 and a consumable dispersant 21 (FIG. 9) in a body of water when the vent 12 a, 12 b, 13 a and 13 b in the flotation member 11 is located above a water line or the vent 19 in the dispensing cartridge is located below the water line. The dispensing cartridge 16 and the consumable dispersant 21 having a specific gravity greater than one when the consumable dispersant is in an unconsumed state and a specific gravity of less than one when the consumable dispersant has been consumed therein thereby causing the dispensing cartridge 16 to become more buoyant than the floatation member 11 as the vent 12 a, 12 b, 13 a and 13 b in the flotation member is brought below the water line as illustrated in FIG. 6C and the vent 19 in the dispensing cartridge is brought above the water line.

Thus the examples show the dispensing cartridge 16 including a flotation member 11 (FIG. 12) having a fixed volume float 29 f and a connector 20 (FIG. 7) securing the flotation member 11 with fixed volume float 29 f to the dispensing cartridge 16 with the fixed volume float and the dispensing cartridge having a center of mass such that the dispensing cartridge normally floats below the flotation member (FIG. 6) when the consumable dispersant is an unconsumed state and the dispensing cartridge floats above the floatation member (FIG. 6C) when the consumable dispersant has been consumed to thereby provide an indication that the consumable dispersant should be replaced.

FIG. 8 shows a perspective view of dispenser 10 with the hemispherical shell 16 s of dispensing cartridge 16 removed to reveal a solid dispersant 21 in the form of two pucks of chlorine and a float 22 having a center of flotation located on a geometrical axis 9 of the dispensing cartridge. Similarly, the dispersant, which may be a single halogen puck or multiple halogen pucks such as chlorine or bromine is centrally located along axis 9. As can be seen from FIG. 8 one side of puck 21 is supported by the grid 30. In the example shown two cylindrical halogen puck 21 are shown, however, one as well as multiple pucks may be used. Other forms of halogen may be used, for example, tablets or granules as the dispersant in dispensing cartridge 16. Similarly, other dispersants besides halogens may be used in dispensing cartridge 16 without departing from the spirit and scope of the invention.

The floating dispenser may be sold as an assembled unit with an upper cartridge 11 and a lower cartridge 16 in an assembled condition with the amount of dispersant in the upper cartridge 11 having a pool life equal to the pool life of the dispersant in the lower dispensing cartridge 16. In still other cases one may use dispersants in the upper cartridge 11 that have a longer pool life than the dispersants in the lower pool cartridge. For example, the dispersant in the upper pool cartridge may have a pool life of three times the pool life in the lower dispensing cartridge. In such cases the floating dispenser may be sold with two spare lower dispersant cartridges that can be replaced. In use in outdoor pools, which have seasonal use one may have the floating dispenser with the dispersant in the upper chamber sufficient to last a season while the consumable dispersant in the lower dispersant cartridge is replaced with a fresh cartridge based on the consumption of the dispersant in the lower dispensing cartridge.

FIG. 9 shows a cutaway view showing the pucks 21 confined lateral by a circumferential rib 16 c and axially by a axial ribs 16 c and 16 d, which together with the grid 30 form a dispersant compartment for the halogen pucks 21. Located below the halogen pucks 21 is a float 22 to provide additional buoyancy to the bottom member. Float 22 may or may not be used depending on the buoyancy relation between the materials in the top dispensing cartridge 11 and the bottom dispensing cartridge. In the example shown the bottom float 22 has the center of buoyancy CB located on the geometrical axis 9.

FIG. 12 shows a side view of dispenser 10 with the hemispherical shell 11 s of dispenser 11 cutaway to reveal float 29 f and the dispersant 42 located therein. FIG. 13 shows a top view of the dispenser 10 without the hemispherical shell of dispensing cartridge 11 revealing a bow tie shaped container with porous walls with water treatment materials contained therein. In this example the dispersant 42 contains a source of metal ions that releases silver ions into the water to assist the halogen in ridding the water of harmful organisms. An example of a source of metal ions is shown and described in King U.S. Pat. Nos. 6,527,952; 6,652,811 and 7,014,780, which are hereby incorporated by reference. A feature of the source of metal ions is that while the metal ions are released the weight of the source of metal ions remains relatively constant. However, the halogen dispersant, which has a specific gravity in excess of 1, is gradually consumed thus causing the center of gravity of the dispenser 20 to change between the lower dispensing cartridge 16 which weighs less as a result of the dispersant consumption while the upper dispensing cartridge 11 remains at substantial the same weight. The shift in the center of gravity generates a torque that causes the dispenser 10 to rotate from the upright condition shown in FIG. 6 to the inverted position shown in FIG. 6C.

FIG. 13 shows a cutaway top view of dispenser 11 with shell 1 is removed to reveal a porous container 40 d having a bow tie shape holding a source of metal ions 9. Located below container 40 d is a float 29 f that provides flotation to dispensing cartridge 11. The center of gravity of porous container 40 d and the contents 9 may be located on the vertical geometric axis 9 or if desired the center of gravity may be located radially to one side of the geometric axis in order to provide a floatation bias during the rotation of the dispenser 10 from the full to the empty condition as illustrated in FIGS. 6 to 6C. For example, offsetting the center of gravity of porous container and the contents toward the portion of the dispensing cartridge containing the elongated ports 20 causes the elongated ports to remain under water as the dispenser 10 rotates from the full to the empty condition. In such a case mineral chamber 40 d is asymmetric with respect to a central axis 9 of the dispenser 10.

While the floating dispenser has been described with respect to two dispersants the floating dispenser may be used with only a single dispersant. For example, floating dispenser 10 contains a fixed volume float 29 and a bottom heavy state when a consumable dispersant is located in the floating dispenser 10, which causes the floating dispenser to float in a first orientation as illustrated in FIG. 6. When the consumable dispersant has been consumed, the floating dispenser 10 inverts end-for-end from the first orientation to a second orientation, as shown in FIG. 6C, due to the floating dispenser changing from a bottom heavy state to a top heavy state caused solely by the consumption of the consumable dispersant in the floating dispenser.

Thus the invention also includes a method of treating a body of water, for example sanitizing the water, comprising the steps of attaching a first hemispherical shaped dispenser 11 having a first dispersant therein to a second hemispherical shaped dispenser 16 having a second dispersant therein where the second dispenser 16 with the second dispersant is less buoyant than the first dispenser. One positions the first dispenser 11 with respect to the second dispenser 16 to select a dispersant rate of the second dispersant (FIG. 10). Next, one places the first dispenser 11 with the second dispenser 16 attached thereto in the body of water to begin the process of water treatment as illustrated in FIG. 6-FIG. 6C.

One can remove the second dispenser 16 from the first dispenser 11 from the body of water when the second dispenser 16 becomes more buoyant than the first dispenser. One can then replace the second dispenser 11 with a further dispenser and place the first dispenser 16 and the further dispenser into the body of water to continue the sanitizing of the body of water. This works well when the first dispersant is a long term pool treatment dispersant, such as a source of ions, and the second dispersant is a consumable dispersant i.e. a halogen having a shorter pool life than the dispersant in the first dispenser; however, other dispersants may also be used in delivering materials to the body of water.

The method may include the step of securing either the first dispenser or the second dispenser to a pool structure with a lanyard to restrain the first dispenser and the second dispenser from movement about the body of water.

The method further includes the step of grasping the first dispenser in one hand and the second dispenser in the other hand and rotating the first dispenser with respect to the second dispenser to select a dispersant rate by increasing or decreasing the fluid ports between the first dispenser and the second dispenser as illustrated in FIG. 10, FIG. 7B and FIG. 7C. 

We claim: 1.-18. (canceled)
 19. A floating dispenser having a central axis comprising: a first cartridge having a base; a second cartridge containing a consumable dispersant therein, said consumable dispersant having a specific gravity greater than one, said second cartridge having a base rotationally securable to the base of the first cartridge to control water access to the consumable dispersant therein with the second cartridge and the first cartridge floating as a unit with the first cartridge located vertically above the second dispensing cartridge when the consumable dispersant is in an unconsumed state and floating vertically below the second dispensing cartridge when the consumable dispersant has been consumed to thereby provide a visual indication that the consumable dispersant has been consumed. 20-32. (canceled)
 33. A dispensing cartridge having a vent and a connector for attachment to a flotation member for supporting the dispensing cartridge and a consumable dispersant in a body of water when the vent is located below a water line said dispensing cartridge and said consumable dispersant having a specific gravity greater than one when the consumable dispersant is in an unconsumed state and a specific gravity of less than one when the consumable dispersant has been consumed therein thereby causing the dispensing cartridge to become more buoyant as the vent is brought above the water line.
 34. The dispensing cartridge of claim 33 including a flotation member having a fixed volume float and a connector securing the flotation member with the fixed volume float to the dispensing cartridge with the fixed volume float and the dispensing cartridge having a center of mass such that the dispensing cartridge normally floats below said float when the consumable dispersant is an unconsumed state and the dispensing cartridge floats above said float when the consumable dispersant has been consumed to thereby provide an indication that the consumable dispersant should be replaced.
 35. A floating dispenser having a fixed volume float located in said floating dispenser, said floating dispenser having a bottom heavy state when a consumable dispersant is located therein and a top heavy state when the consumable dispersant has been consumed to thereby invert the floating dispenser in an end-to-end condition.
 36. The floating dispenser of claim 35 wherein the fixed volume float comprises a solid float having a specific gravity of less than
 1. 37.-41. (canceled) 